Create UICollectionViewCell subclass with xib

Piero picture Piero · Jan 22, 2013 · Viewed 63.8k times · Source

I'm trying to create a UICollectionViewCell subclass with linked a xib, I have do this: I have create a new xib file and I have add a UICollectionViewCell in it, then I have create this subclass file:

@interface MyCell : UICollectionViewCell

@property (weak, nonatomic) IBOutlet UILabel *label;
@end

Also I have linked in the file owner custom class the MyCell class in interface builder, and I have added a UILabel, then in my UICollectionView viewDidLoad I do this:

[self.collectionView registerClass:[MyCell class] forCellWithReuseIdentifier:@"MyCell"];

UINib *cellNib = [UINib nibWithNibName:@"MyCell" bundle:nil];
[self.collectionView registerNib:cellNib forCellWithReuseIdentifier:@"MyCell"];

As well as in this:

- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
MyCell *cell = (MyCell*)[cv dequeueReusableCellWithReuseIdentifier:@"MyCell" forIndexPath:indexPath];


cell.label.text = @"Cell Text";


return cell;
}

However this doesn't work, I receive this error:

*** Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<NSObject 0x907eca0> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key label.'

What did I do wrong? How can I connect a UICollectionViewCell subclass to a xib, and display it in a UICollectionView?

EDIT:

i have do this:

- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath
{

NSString *identifier = @"MyCell";

static BOOL nibMyCellloaded = NO;

if(!nibMyCellloaded)
{
    UINib *nib = [UINib nibWithNibName:@"MyCell" bundle: nil];
    [cv registerNib:nib forCellWithReuseIdentifier:identifier];
    nibMyCellloaded = YES;
}

MyCell *cell = (MyCell*)[cv dequeueReusableCellWithReuseIdentifier:@"MyCell" forIndexPath:indexPath];


cell.labelCell.text = @"Text";


return cell;
}

Answer

perrohunter picture perrohunter · Jan 22, 2013

Make sure the cell on the .xib file know what's the type of the cell.

Select the cell on your interface builder

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and then on the identity inspector

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Subsequently associate your labels with your properties. (I think you already did that)

Then I'd recommend to verify if you already loaded the .xib file on your cellForItemAtIndexPath: method

NSString *identifier = @"MyCell";    

    static BOOL nibMyCellloaded = NO;

    if(!nibMyCellloaded)
    {
        UINib *nib = [UINib nibWithNibName:@"MyCell" bundle: nil];
        [cv registerNib:nib forCellWithReuseIdentifier:identifier];
        nibMyCellloaded = YES;
    }